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See Chinese contents: GB 28053-2011 GB 28053-2011: [GB/T 28053-2011] Composite cylinders for breathing apparatus
This standard specifies the types and parameters, technical requirements, test methods and qualification standards, inspection rules and markings, packaging, transportation and storage requirements of fully wrapped carbon-fiber reinforced aluminum liner composite cylinders for breathing apparatus. This standard applies to the design and manufacture of gas cylinders which have a nominal working pressure not greater than 30 MPa, a nominal volume of not greater than 12 L, an ambient temperature of use of -40-degree ~ 60-degree, is refillable of breathing gas.
